Search results
The Topanga Canyon Formation (/ t ə ˈ p æ ŋ ɡ ə / ⓘ) is a Miocene epoch geologic formation in the Santa Monica Mountains, Simi Hills, Santa Ana Mountains and San Joaquin Hills, in Los Angeles County, Ventura County, and Orange County, southern California. [1]
- The Miocene Topanga Group of Southern California—A 100-Year History of Changes in Stratigraphic Nomenclature
- U.S. Geological Survey
- Figure 1.
- Acknowledgments
By Russell H. Campbell, Thane H. McCulloh, and John G. Vedder
U.S. Department of the Interior KEN SALAZAR, Secretary U.S. Geological Survey
Figure 1 (preceding page). Index map of coastal southern California showing selected physiographic features and area of Figure 2. Shaded relief image prepared by R.M. Alvarez. Islands (in italics): SMI, San Miguel Island; SRI, Santa Rosa Island; SCZI, Santa Cruz Island; AI, Anacapa Island; SNI, San Nicolas Island; SCTI, Santa Catalina Island; S...
Many workers have contributed to the literature and unpublished discussions describing the stratigraphy and spatial distribution of the Topanga Group and associated strata. The references that are cited in the above chronology are a small sample; they were selected to represent our view of how the current stratigraphic nomenclature developed. Ove...
Apr 4, 2024 · Summary: In central and western Santa Monica Mountains west of Topanga Canyon, Topanga Formation as defined by Kew (1923) is raised in rank to Topanga Group. Subdivided into (ascending): Topanga Canyon Formation (new), Conejo Volcanics and Calabasas Formation (new). Age is middle Miocene.
Topanga Formation. The Topanga Formation comprises mixed sedimentary and volcanic rocks with an erosional base (unconformity) on underlying sediments. The formation consists of basal marine conglomeratic sandstone, a more volcanic middle layer with submarine lava flows and tuffs, and an upper sedimentary breccia, conglomerate, sandstone, and a ...
The Topanga Canyon Formation ( / təˈpæŋɡə / ⓘ) is a Miocene epoch geologic formation in the Santa Monica Mountains, Simi Hills, Santa Ana Mountains and San Joaquin Hills, in Los Angeles County, Ventura County, and Orange County, southern California.
Feb 1, 1991 · The Topanga Canyon Formation within the central Santa Monica Mountains of southern California is a sequence of lower through middle Miocene conglomerate, sandstone, and siltstone deposits that record a lower, wave-dominated, marine, retrogradation cycle; a middle, river-dominated, marine and fluvial, progradational cycle; and an upper, ...
Topanga Canyon, 10 mi northwest of Santa Monica, Los Angeles Co., CA (Kew, 1924; Susuki, Takeo [abs.], GSA Bull., v. 63, no. 12, pt. 2). AAPG geologic province: Los Angeles basin*
